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A203492 Number of 2Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns 1
3, 10, 80, 556, 3348, 20596, 134412, 888232, 5836068, 38457456, 255381636, 1704162724, 11399565860, 76433483528, 513785171540, 3461284463632, 23360156262164, 157908381404144, 1068981156413892, 7246198178206132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A203491

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..97

EXAMPLE

Some solutions for n=5

..0..2..0..2..2....1..0..1..2..0....2..1..0..2..1....1..1..1..2..1

..0..1..2..2..1....2..0..2..0..0....2..2..1..1..0....1..2..1..1..1

CROSSREFS

Sequence in context: A027159 A236696 A262259 * A320258 A136554 A136505

Adjacent sequences:  A203489 A203490 A203491 * A203493 A203494 A203495

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2012

STATUS

approved

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Last modified October 17 19:24 EDT 2019. Contains 328127 sequences. (Running on oeis4.)